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bar_aggregate_sort_by_encoding.vg.json
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bar_aggregate_sort_by_encoding.vg.json
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{
"$schema": "https://vega.github.io/schema/vega/v5.json",
"description": "A bar chart that sorts the y-values by the x-values.",
"background": "white",
"padding": 5,
"width": 200,
"style": "cell",
"data": [
{
"name": "source_0",
"url": "data/population.json",
"format": {"type": "json"},
"transform": [{"type": "filter", "expr": "datum.year == 2000"}]
},
{
"name": "data_0",
"source": "source_0",
"transform": [
{
"type": "aggregate",
"groupby": ["age"],
"ops": ["sum"],
"fields": ["people"],
"as": ["sum_people"]
},
{
"type": "filter",
"expr": "isValid(datum[\"sum_people\"]) && isFinite(+datum[\"sum_people\"])"
}
]
}
],
"signals": [
{"name": "y_step", "value": 17},
{
"name": "height",
"update": "bandspace(domain('y').length, 0.1, 0.05) * y_step"
}
],
"marks": [
{
"name": "marks",
"type": "rect",
"style": ["bar"],
"from": {"data": "data_0"},
"encode": {
"update": {
"fill": {"value": "#4c78a8"},
"ariaRoleDescription": {"value": "bar"},
"description": {
"signal": "\"population: \" + (format(datum[\"sum_people\"], \"\")) + \"; age: \" + (isValid(datum[\"age\"]) ? datum[\"age\"] : \"\"+datum[\"age\"])"
},
"x": {"scale": "x", "field": "sum_people"},
"x2": {"scale": "x", "value": 0},
"y": {"scale": "y", "field": "age"},
"height": {"signal": "max(0.25, bandwidth('y'))"}
}
}
}
],
"scales": [
{
"name": "x",
"type": "linear",
"domain": {"data": "data_0", "field": "sum_people"},
"range": [0, {"signal": "width"}],
"nice": true,
"zero": true
},
{
"name": "y",
"type": "band",
"domain": {
"data": "source_0",
"field": "age",
"sort": {"op": "sum", "field": "people", "order": "descending"}
},
"range": {"step": {"signal": "y_step"}},
"paddingInner": 0.1,
"paddingOuter": 0.05
}
],
"axes": [
{
"scale": "x",
"orient": "bottom",
"gridScale": "y",
"grid": true,
"tickCount": {"signal": "ceil(width/40)"},
"domain": false,
"labels": false,
"aria": false,
"maxExtent": 0,
"minExtent": 0,
"ticks": false,
"zindex": 0
},
{
"scale": "x",
"orient": "bottom",
"grid": false,
"title": "population",
"labelFlush": true,
"labelOverlap": true,
"tickCount": {"signal": "ceil(width/40)"},
"zindex": 0
},
{"scale": "y", "orient": "left", "grid": false, "title": "age", "zindex": 0}
]
}